Lubrication



y 1932- H. H. GILBERT 1,859,438

LUBRICATION Filed Sept. 28, 1927 Patented May 24, 1932 HEN RY H.GILBERT, OF DETROIT, MICHIGAN, ASSIGNOR TO GENERAL'MOTORS COR- PORATION,OF DETROIT, MICHIGAN, A. CORPORATION OF DELAWARE the bearings.

LUBRICATION' Application filed. September 28, 1927. Serial No. 222,535.

" This invention relates to automotive vehicles and particularly to theoiling system of the internal combustion. engine thereof.

'In the past some difficulty has been experi- 1 enced in-startinginternal combustion engines during cold weather, and it is the object ofthe present invention to overcome this difficulty by providing a systemof lubrication which will permit of an adequate supply 7 of hot oil tobe furnished the working parts 7 of the engine during the startingperiod.

The object of the invention is accomplished by placing at any suitablepoint near the engine, but preferably in the oil pan thereof, a suitablecontainer through which the oil is forced by the usual oil pump beforereaching ed by providing a surrounding shell spaced therefrom. Thisspace may be either an air space or may be filled with a suitableinsulating material, such as asbestos.

While the engine is running the oil is forced through the container, andin due time becomes heated up and after the engine has stopped thecontainer serves as a reservoir and traps a considerable quantity of hotoil.

' On restarting the engine this hot oil is forced directly to thehearings or to the cylinders and permits of a ready starting of theengine.

While the disclosure on the accompanying drawings shows the hot oilsupplied only to the bearings, an additional lead pipe may obviously berun to each cylinder so that a suitable supply of hot oil may befurnished during the starting period. To prevent a continual supply ofthe lubricant passing to the cylinders, a thermostatically operatedvalve may be placed in the pipe and which will be closed after theengine has run a suitable period, due to the generation of heat.

The invention is disclosed on the accompanying drawings in which:

Figure 1 is an end view of a V-type internal combustion engine withparts broken away and portions shown in section to illustrate theinvention.

Figure 2 is the detail side view of the container and its connectionsshown in Figure 1.

Figure 3 is the transverse section through the container on the line 3-3of Figure 2.

This container is heat insulat- Figure 4 is a view similar to Figure 3of modification. y 7

Referring to the numbered parts on the drawings, 10 indicates aninternal combustion engine as a whole, 12 one of the cylinders thereof,and 14 the piston operating in the cylinder head.

The engine is equipped with the usual gear type oil pump shown at 16.This pump has an outlet 18 which delivers the oilto a conduit 20 leadingto a container 22 resting on the bottom of the oil pan 24,.secured tothe crankcase 26. The container 22 is so placed that the oil will flowthereto by gravity when the engine is not running. The container 22 isheat insulated from its surroundings by means of an outer shell 28.Between the container 22 and the shell 28 there is an air space '30 asshown in Figures 2 and 3. This space leadto the crankshaft bearings. Ifdesired,

additional branches may lead tothe camshaft bearings.

If desired the outlet 34 may have an additional conduit leading to agroove 40 in the engine cylinder to permit of the conduction of the hotoil to the cylinders during starting periods. In this conduit therewillpreferably be placed a thermostatically, controlled valve which willclose when the temperature of the engine reaches a sufficient degree.The object of this valve is to prevent a constant flow of lubricant tothe cylinders after the engme is running. V

The operation of the construction is as follows: When the engine isrunning the pump 15 will force all of the oil into the container 22, andon to the bearing portions of .the engine.

' As the engine continues'to run the oil will bestarting the engine.Thehot' oil trapped in the container 22 will retain its heat for aconsiderable period, say three or four hours, and on restarting theengine, a few revolutions of the pumpwill force the supply of hotlubricant held in the container 22 to the bearing or working parts andcause a ready flow of luliricantto'the frictio'n sur-v face. This supplyof hot hubricant will',permit ofthe ready starting of the engine.

10 'Iclai rniz' 7 bustion engines having an oil pan andan oil pump, anoil container in said pan for's'tor- 111g heated oilduringinormalrrunningaofsthe engine, a shell surrounding said containerands-mead "thereiroi'n to folm a heat insulator, a conduit leading fromthepuinp'to said iontainerfand a second conduiti leading from 2 engine.r V

I 2. In clolrnbii'iation with an internal "combust-ion engine having anoil-pan' andyan oil punipj'a container in said pan 1 for receiving for?delivering oil from the container ii to the 1 w i'king parts oftheengine during-the start in period. a r 1 g, a 3. In combinationwith an 1internal com- -'-bu'stion-e ngine having an-oil pump andan I ;theengine? to supply rheated lubricant ew-hen oil pama shell resting intheoilpan,"acontairir withinfsaidshell-and heat insulated 1: *ftiiifroinandadapted to store'heated oil 5 diiring the normal running oftheengine, an inlet corfdu 'it -"t'o and (container from said pump, andan outlet conduit fr'om said eontainer 1eal-ing to the engine bearings.

#4. Ina l ubricating system'forinternalcom- 'tusnon engines having an ioil pm,; an an pam ansaidsystem;antenna containerin said pan for storingheated lubricant during normal a e-renewal "theengine, a coi-iduit N lea'clirrgfrom 'the puriap t-o thecontainenand 4 *a second'condiiitlead'ingfrom-thecontaineri to the workingiparts of the engine to''supply V n, 5. In combinat'on With' a-n internal combustio'n enginehaving-an oil pan-and an oil pump," a container" in thep an for"receiving and st-erifig lrieated dil' from the pump during normaloperation of theengineg an insulanon eomsr'isis en outer shellaroundsaid container heat insulated therefrom, and

'--mens for deliveringfoil from the container t-6th orking' partsof theengine.

hustioneiiginhaving an oil pan and an oil M pama c'on'tainer'fin the"pan *for receiving and staring heated Oil from the pump during im'rmaioperation 'of -*the engine; an insula- {tlon", comprisingan outer shellaround i said eonta iner spaced thererrem and confining 1. In "an"oiling system for internal comsaid" container to the working p arts*ofthe 7 livering parts of the engine.

oil from the container to the working 7. In combination with an internalcombusr' 9. an :combinati-on' -with a i'inmim'ai (30m bustionengine,means forkstor'mg .=-a; quantity manifold leadingto there :parts'whenifstartingathe'eng'ine. 6

10.: In 2a;1-lubricating system itorf internal.

combustion engines :having anoil pan, email I pumpinsaidsystem;alubm-eantemtainen in tolthecontainen andia seco from the 7container tolthe'wonking i parts of starting'the'engme.

of hot oil whiletherzen'gine {IS running, jan'd I I 'neT'bearingssfor.deliveringzsaidestoredf-hotzml'itol the wearing said pan, for:retainingkheated a'lfihliqtfit, a i

sheILsuIrOundi-ngFQaid:contaimr-aand-,spaeed therefrom, a eonduit:1ealiing "frnm%the pump fconiduitleadin :a.

pump in saidz system za lnbnicanta-container in said pan Efor' detaining(heated lubricant, umeansiifor insulatingmaidzconflainenirom eaidroilrpanpa conduit :leadiin-grfroms theaprilmp-i' the containeryaandvn"secondi conduit eluding from the cdnliaiherntm theewonking parts: of

' the-engine :to% supply heated! linbniomt vwhen =rstarting theHENRY'-H.:GILBERT.

